viikoittaiseen

Viikoittaiseen is a grammatical form in Finnish. It is the illative singular form of the adjective viikoittainen, which means weekly or occurring on a weekly basis. As a case form of an adjective, viikoittaiseen is used to modify a noun in the illative case, indicating movement toward or into a weekly context.

The word viikoittainen is formed from the noun viikko (week) with the adjectival suffix -ittainen, producing a term that describes something relating to or occurring on a weekly basis. In Finnish, adjectives inflect to agree with the noun they modify, including case and number. The illative singular ending commonly surfaces as -iseen, which gives viikoittaiseen as the form used when the noun it modifies is in the illative case.

In usage, viikoittaiseen appears most often in formal or precise language, particularly when describing plans, schedules, or processes that are oriented toward a weekly cadence and when the associated noun is in the illative case. For example, in a phrase like viikoittaiseen aikatauluun, the adjective agrees with aikataulu in illative, conveying “into a weekly schedule.” Similar constructions can be found in academic, administrative, or legal Finnish, though in everyday speech speakers may opt for the adverb viikoittain or other wording to express weekly repetition.

See also: viikoittainen (weekly), viikoittain (weekly, adverb), viikkokohtainen (week-specific, context-dependent). Viikoittaiseen is one of several inflected forms of the base concept of weekly cadence in Finnish grammar.